[I am the author]
Last year I put out this book as a free open text, and posted about it on HackerNews. I was asked, often when the book would be out in physical form.
Now that it's available on Amazon officially (and also Lulu), I guess I can announce it. Thanks to everyone for all your feedback, corrections, and updates so far.
In case you're wondering what a metaheuristic is: it's the buzzword for stochastic optimization methods such as genetic algorithms, ant colony optimization, simulated annealing, and so on.